When you receive a POST request, you receive a form represented by one or more fields, and these fields include any files (possibly multiple files). Content-Type multipart/form-data.
, . GET, . , JPG PUT, Content-Type image/jpeg. , , PUT.
$request->getContent() . , PUT , , POST.
- PUT, , . , PUT /api/record/123/attachment?filename=example.pdf. , ( ), ID (123) , .